Radio apparatus



M rch 9, 1929. A. F. SANFORD 1,795,999

RADIO APPARATUS Filed Aug. 18, 1925 2 Sheets-Sheet 1 wamwfww R 1 www A. F. SANFORD RADIO APPARATUS 2 Sheets-Sheet 2 Filed Aug. 18, 1925 4 1 v v 3 4 B C 4 B W y m a z E C 4 F N\\\\\\ a G m s G G. G M a V E 9 E 0 m Y W\\\\\\ fl e G G 2 6 Patented Mar. 19, 1929.

UNITED" STATES ALFRED E. SANFORD, or KNoXvInLE, TENNESSEE.

RADIO: APPARATUS;

Application filed August 18, 1925. Serial" No. 51,068..

This invention relates particularly to means for facilitating placing and replacing aradio receiving'apparatus into tune with the apparatus of various radio sending stations. o

The chief obj ect of this invention is to provide means whereby, whena tuning member in a receiving set has, by trial or manipula tion, been put into tune with a chosen sending station, a record ornotation can be made on the apparatus which will enable the operator to subsequently shift an appropriatepart or parts of the apparatus as indicated by said record to again put said receiving apparatus into tune with the saine sending stationwith- 1.5 out the need of repeating trial to again find the required positions for said parts. 7

A further object of this invention is to provide. ample'surface capacity for making such records or notations. j

i A further object of this invention'isto fprovidethe sending station finding mechanism in the form of an attachment adapted to be placed adjacent a previously-manufactured receiving set and connecting the attachment with a tuning shaft of said receiving set. 1

In the accompanying drawings, 1

Fig. -1 is a'front elevation of a receiving setv with my improved attachment applied therea Fig. 2 is anupright section on'th'e line 2-2, of 1 looking-toward the right, onlyv the front part of the ordinaryreceivingfset being shown; I P

Fig. 3 is a sectionon theiline, 8 3, of Fig. 1, looking in the direction of the arrows;

, Fig. 4 is a section similar to Fig. 2, the transmission, gearing Consisting of three, instead of two spur gear Swheels.

Referring first to Figs. 1,2 and 3, G is the front wall of an ordinary receiving set. G is the base and G is the top wall of said set. Gr? is the tuning shaft to which my improved at-' tachment isto be connected for the purpose of turning said shaft for tuning. T is any table top or platform upon which the receiving set and the attachment are supported. V

The parts of the attachment and their operation will now be described.

- A horizontal base, A, is supported on the table, T, by means of three upright screwsextending through and threaded in the base, the lower ends of the screwsbearingon the ca ble'. By means'of'thesescrews, the height of said base may be adjustedfor a purpose to be make clearfurther on. A column, B, has. a

together for movement in 'unison. 1

ing'fsaidknob will cause the turning of said shaft, The other endof said shaft extends rearward beyond the rear bearing, B A spur gearwheel, C surrounds and is fixed to said shaft. Said shaft meshes with a spur gear wheel, F, which has an elongated lmb, F of insulation extended toward the wall, G.

Said wheel and'the greater part of said hub surround and are turnable on a jOUIHZLL-F which is rigid on the adjacent part of the column,B. Thejournal, F hasacircumferential channel,F?. QScreWs, F extend through thehub and into saidchannel-and thus-serve as keys to keep thehub and the wheel, F, from moving awayfromthe colu1nn,B.

By means of the ad usting screws, A the height of the attachment has been adjusted to bring thejournal,;F ,to theheight of the tuning shaft,G thus allowing the moving of theattachment'towardthe wall, (fauntil the hub, F has surrounded the outer end'ofthe tuning shaft. ,The set screw, F extendsradially through thejhub, F and bears against the tuning shaft, G to bindthe hub and the shaft It wil-l 'now be seen that turning the hand knob, C, will cause theturning of the shaft, C, the disc, D, the spur gear wheels, C and F,

the hub, F and the tuning shaft,Gf. It will also be seen thatthese same movementsmay be effected by grasping the edge of the disc,

D, and turning it. [Inthis manner, the ratio of movements is modified, and movement at the edge or-rimpf' the disc beingmuch reduced. at the spur gear wheel, C

.A guide or indicatorfE, extends over the rim or edge of the disc, and reaches to and is secured to the two parts of the column, B. In the form shown byth'e drawings, the forward part of the indicator i sslotted sufiiciently to permit freaching through the slot with a writing 1 instrument and? placing symbols or other writlng on the disc.

The two spur gear wheels are preferably made of different diameters, in order that the velocities of the shafts, C and G will be different. The drawings show the wheel, C made smaller, in order that the shaft, C, may turn the faster, whereby the disc, D, is turned faster than is the shaft, G Thus a larger part of the surface of the disc is made to pass the guide or indicator, E, during a fractional rotation of the tuning shaft. The particular proportion or ratio of these gear wheels in the drawings is two to one. In many receiving sets now in use, the tuning shafts make only approximately a one half turn. Accordingly, this two to one gearing provides for a full rotation of the disc, D, during the half turning of the tuning shaft. Thus the entire outer face of the disc is made available to receive indiciashowing the positions on the disc in relation to positions of the tuning shaft in its range of turning.

At the left of the tuning shaft, G, a tuning shaft, I, is applied to the wall, G, and on said shaft is fixed an ordinary dial, I. A tuning shaft, J, is similarly applied to the Wall, G, at the right of the shaft, G, and a dial, J is similarly applied to the shaft, J. These are parts of the original apparatus.

The dials, I and J have the usual graduations along only one half of the rim, this being because those shafts are to be given only a one half turn, as has already been described in connection with the shaft, C1 Provision is made for placing on the disc, D, indieia of the positions of each of the three tuning shafts when they have been set to bring this receiving apparatus'into tune with a chosen sending station. After the three shafts have been thus positioned, the initials of thesending station and the name of that station may be entered on the portion of the disc which is exposed'through the slot of the indicator, E. Associated with this entry, there are to be placed numbers indicating the positions of the dials, I and J On the outer face of the wall, A, and above each dial, I and J is an I arrow. The number under each of these arrows 1s to'be made a part of this record on the disc, sothat for thereafter re-setting the tuning shafts, the disc is turned to bring the record into the slot of the indicator, and each dial is then turned to bring the number ofthe record into the indicator slot. Fig. 1 of the drawings shows the disc divided into four zones which are concentric to the shaft, C. Theinner of said zones is to receive the initials of sending stations. The next of said zones is to receive the location of the station. The third of said zones is to receive figures representing the number which is under the arrow on the dial, I when the shaft, T, has been set, and the fourth or outer of said zones is to receive the figures representing the number under the arrow on the dial, J when the shaft, J, has been set. In the drawing, 60

indicates the position of the dial, I and 45 indicates the position of the dial, J VVMBF and lVIiami, indicate the station, and these four entries indicate the position of the disc, D, when the middle tuning shaft, G is in tuned position. The drawing shows below the indicator a record for Chicago. To again tune for Chicago, the disc, D, is to be turned to bring the Chicago record into the slot of the indicator. That brings the middle tuning shaft, G into tune with Chicago. Then the dial, I is turned to bring.4ca under the adjacent arrow, and the dial, J is turned to bring 4E7v under the adjacent arrow. Above the indicator, the drawing shows arecord of Cuba. To again get into tune with that station, the disc is to be turned until that record is in the indicator slot, and then the dials, I and J are turned to W0 and 73, respectively.

In the form above described, to turn the three tuning shafts in the same direction, the disc, D, must turn in opposition to the direction of turning of the dials, I and J This is due to the operation of the two spur gear wheels, C and F. In Fig. 4, this gearing is modified to provide the same direction of rotation for the dials and the disc. This is accomplished by placing an idle spur gear Wheel, 1-1, between the spur gear wheel,C and I a ournal, H fixed on the column, B, rotatably supporting the idle wheel, II.

In lieu of writing or marking directly on the face of thedisc, a removable sheet ofpaper or similar material may be placed "on the disc to serve as the record-receiving surface.

lVhile the drawings show my mechanism applied to the intermediate of three tuning shafts, it will be understood that the mechanism may be applied to any tuning shaft. Probably the most sensitive or controlling shaft should be chosen.

I claim'as my invention,

1. In a portable structure adapted to" be placed near a radio receiving set andsupported independently of said set as a companion structure, the combination of a base, driving mechanism having a member adapted to be placed into alignment with andconneeted with a tuning shaft of the receiving set,

and member in operative relation with said driving mechanism and bearing a record-receiving surface whereby said record-receiving surface is given moven'ient in relation to the turning of the tuning shaft, substantially as described.

2. In a portable structure-adapted to be placed near a radio receiving set and supported independently of said set as a companion structure, the con'ibination of a base, driving mechanism having a memberadapted to be placed into alignment with and connected with a tuning shaftof the receiving set, and a rotary member in operative rela tionith said driving meehanism and bearing a record-receiving surface whereby said reccrd-receiving surface is given movement in relation to the turningof the tuning shaft, substantially as described.

3. In a portable structure adapted to be placed near a radio receiving set and. supported independently of said set as a com panionstructure, the combination of a base, driving mechanism having a member adapted to be placed into alignment with and connected with a tuning shaft of the receiving set, and a member in operative relation with said driving mechanism and bearing a record ing a record-receiving surface wherebysaid' record-receiving surface is given rapid movement in relation to the turning of the tuning shaft, substantially as descnbed.

5. In a portable structure adapted to be placed near a radio receivingset'and supported independently of said set as a companion structure, the combination of a base, drivi mechanism having a member adapted to be placed into alignment with and connected with a tuning shaft of the receiving set, and a rotary disc in operative relation with said. driving mechanism and bearing a record-receiving surface whereby said recordreceiving surface is given movement in-rel a tion to the turning of the tuning shaft, substantially as described.

6. In a portable structure adapt-ed to be.

placed near a radio receiving set and supported independently of said set as a companion structure, the combination of a base, driving mech anism h avinga member adapted to be placed into alignment with and con nected with a tuning shaft of the receiving set, and a rotary disc in operative relation with said driving mechanism and bearing a-recordreceiving surface whereby said record-receiving surface is given rapid movement in relation to the turning of the tuning shaft, substantially as described. i

7. In a portable structure adapted to be placed near a radio receiving set and sup ported independently of said set as a companion structure, the combination of a base, driving mechanism having a member adapted to be placed into alignment with and connected with a tuningshaft of the receiving set, a rotary member in operative relation" with said driving mechanism and bearing a. record-receiv-ing surface whereby said record-receiving surface 1s given movement in relation to the turning of the tuning shaft, and indicating means adjacent the record-receiving member,

'su'bstantially as described.

8.'In a portable structure adaptedto be placed neara radio receiving set andsupported independently of said set as a companion structure, the comblnatlon of a base, driving mechanism having a member adapted to be placed into alignment with and connected with atuning shaft of the receiving set, a member in operative relation with said driving mechanism and bearing a record-receiving surface, whereby said record-receiving surface is given movement in relation to the turning of the tuning shaft, and means for adjusting the height of said structure, substantially as described.

9. in a portable structure adapted to "be placed near a radio receiving set and supp0rted independently of said set asa companion structure, the combination of a slotted column in which are horizontal bearings, a driving shaft in said bearings, a disc in the slot of said column and surrounding and fixe'd to said shaft, and drivingmechanism in operative relation with said shaft and adapted to be connected with a tuning shaft of the receiving set, substantially as described.

'10. In a portable structure adapted to be placed near'a radio receiving set and supported independently of said set as a companion structure, the combination of a base, driving shaft, a rotatable coupling adapted to engage the tuning shaft of a receiving set, gearing intervening the driving shaft'and said coupling,

.and a member-inoperative relation with the driving shaft and bearing a record-receiving surface, substantially as described.

11. In a portable structure adapted to be placed near a radio receiving set, the combination of a drivingmechanism having a mem- .ber adapted to be placed into alignment and connected with a tuning shaft of thereceiving set, and a member in operative relation with said driving mechamsm and bearing a recordreceivingsurface whereby said record-receivingsurface is given movement in relation to the turning of the-tuning shaft.

12. In aportable-structure adapted to be placed near a radio receiving set, the combination of driving mechanism having a member adapted'to be placed into engagement with a tuning shaft of the receiving set and while so engaged be rotated for rotating said shaft,

and a member in operative relation with said driving mechanism and bearing a record-re ceiving surface wherebysaid record-receivin g surface is given movement'in relation to the turning of said shaft. v

13. Ina portable structure adapted to be placed near a radio receiving set, the combination of a base, mechanism having a member adapted to be" placed into engagement with a I tuning shaft, means for turning said member for turning said shaft, means for adjusting the height of said base to bring said connecting member to the height required for connecting 5 with said shaft, and a member in operative relation With said driving mechanism and bearing a record-receiving surface, whereby said record-receiving surface is given movement in relation to the turning of the tuning shaft.

In testimony whereof I have signed my 10 name, this 29th day of July, in the year one thousand nine hundred and tWent -five.

ALFRED F. SANFORD. 

